Pincer-actuating mechanism for lasting-machines.



P. B. DROWN.

FINGER AGTUATING MECHANISM FOR LASTING MACHINES.

APPLICATION n mm D110. 23, 1910. mnwnn AUG. 19, 1911.

1,009,288, I Patented Nov. '21, 1911.

UNITED srarns PATENT OFFICE.

FRANK E. DROWN, 0F BEVERLY, MASSACHUSETTS, ASSIGNOR TO UNITED SHOEMACHINERY COMPANY, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

PINCER-ACTUATING MECHANISM FOR LASTING-MACHINES.

Specification of Letters Patent.

Patented Nov. 21, 1911.

Application filed December 23, 1910, Serial No. 598,956. Renewed August19, 1911. Serial No. 645,012.

To (ZZZ whom it may concern:

Be it known that I, FRANK E. DROWN, a citizen of the United States,residing at Beverly, in the county of Essex and State of Massachusetts,have invented certain Improvements in Pincer-Actuating Mechanism forLasting-Machines, of which the following description, in connection withthe accompanying drawings, is a specification, like reference characterson the drawingsindieating like parts in the several figures.

This invention relates to pincer actuating mechanisms for use in lastingmachines and is hereinafter described as applied to a lasting machine ofthe type described in Unlted States Letters Patent No. 584,744; dated Inmachines of the type re-" June 15, 1897. ferred to, the mechanism forclosing the pincers is actuated by a cam on the main shaft of themachine through suitable con' nections which comprise a roll pivoted inan arm of a rock shaft. This rock shaft is secured in bearings in anupdraw lever which is mounted above the cam shaft and which has atilting or tipping movement in a direction transverse to the axis of themain or cam shaft. The cam aforesaid does not share in this tippingmovement. At every tipping of the updraw lever and consequently of therock shaft and its dependent arm, there is necessarily a tipping of thebearing surface of the cam roll relatively to the edge of the cam whichit engages. These tipping movements imparted to the cam roll through itsconnection with the tipping updraw lever occur during every actuation ofthe updraw lever to move the pincer mechanism upward or downward. Thusduring a considerable part of the operation of the pincer actuatingmechanism the cam roll is prevented from riding evenly on the edge ofthe cam. As a result the roll wears out rapidly, and, what is moreimportant, the edges of the roll dig into and rut out the bearing edgeof the cam thus necessitating frequent and expensive replacing of camsand entailing often inconvenient delays for substitution of new parts.

Accordingly an object of the present in vention is to overcome thesedisadvantages of the construction now in use by providing an arrangementwhereby the bearing surface of the cam roll will remain in substantiallysquare engagement with the edge of the cam during the described angularmovement of the updraw lever. To this end I have pro vided mechanism soconstructed and arlranged that the aforesaid cam roll is not affected bythe tipping movement of the rock shaft with the updraw lever, and sothat moreover, the wear caused as aforesaid will ibe taken by a bearingprovided for that purpose instead of on the cam edge. To attain .theseobjects, I preferably dispose an interimediate member between the camedge and the adjacent arm of the rock shaft, this mem- ;ber beingarranged to swing about a fixed axis which .is parallel with the camshaft. This swinging arm carries the cam roll and has another faceadapted to engage a roll pivoted in the arm of the rock shaft. As aresult, every tipping of the rock shaft imparts relative movement to theroll on the rock shaft arm and its bearing on the swinging member butleaves undisturbed the angular position of the axis of the cam roll withrelation to the cam edge. Moreover the above mentioned bearing on theswinging member for engaging the roll on the arm of the rock shaft takesthe wear above described instead of the cam edge. These and otherfeatures of my invention will clearly appear from the following detaileddescription read in connection with the accompanying drawings which showa preferred em- :bodiment thereof, applied to a machine of :the typedescribed in the aforesaid Letters Patent.

Referring to the drawings :Figure 1 is a perspective view of a portionof the pincer mechanism of the aforesaid patent, showing my inventionapplied thereto- Fig. 2 is a detail. Fig. 3 is a section on the line 22of F 1. Fig. 4 is another detail. Fig. 5 is a perspective showing thepivoted jaw controlling spring. Fig. 6v shows a variation. Fig'. 7 is aside elevation of the pincers with part of the casing broken away toshow the mounting for the pivoted jaw. The machine to which by way ofillustration this invention is described as being applied comprises acolumn that supports a framework or head B in which is j ournaled themain shaft D of the machine upon which are the cams and gears, includingthe updraw cam 280 and the pincer closing cam 40,

which give the proper motions to the several mechanisms for operatingthe various lasting devices.

Journaled in the head B is a pivot rod 19 (Fig. 1) on which is mountedthe updraw lever 18 from the front end of which the pincers aresuspended. A rock shaft 80 is journaled at one end in a bearing 82 inlever 18 and at its other end the said rock shaft 80 is journaled in asleeve 34 which embraces an end of the rod 19 on which lever 18 ispivoted.

Fixed at one end of the rock shaft 30 is an arm 86 which is provided atits other end with suitable yielding connections with a plunger 27. Thesaid plunger 27 rests upon the top end of a pincer bar 15 to which ispivotally connected at its lower end a movable pincer jaw 16. The bar 15is disposed for longitudinal movement in the center of a tubular bar 18which is connected a its upper end to the lever 18 and which carries atits lower end the fixed-pincer-jaw 14. It will be observed that amovement of the bar 15 in one direction operates to open, and a movementthereof in the opposite direction operates to close the pincers-jaws 14and 16. In the bar 15 are pins which, projecting outwardly through slotsin the bar 18, engage one end of a coil spring S seated against a fixedcollar on bar member 15. Downward movement of plunger 27 and bar 15 forclosing together thepincers jaws produces con traction of spring S whichby its expansive force lifts bar 15 against plunger 27 for reopening thepincers jaws when permitted to do so by the movement of the rock shaft80. The rock shaft 80 is thus actuated to rock about its axis by meansof the cam 40 on shaft D through connections between rock shaft 80 andcam 40. These connections comprise an arm 88 secured to the rock shaft80 by split clamps 41. 42. This arm 88 has a bifurcated lower end inwhich is pivotally mounted a roll 44.

Lever 18 heretofore referred to through its connections with pincers-bar18 is aranged to effect a lifting and lowering of the pincers mechanismas a whole by a suitable tipping or tilting of the lever 18 about therock shaft 19 as an axis. To effect this tipping movement of lever 18 anactuating cam 280 is mounted on shaft D. This cam 280 engages a pin orroll on a plate E. The plate E is suitably connected to one end of lever18 whereby on the actuation of cam 280, lever 18 is given the aforesaidtipping movement at predetermined times depending upon the formation ofthe cam groove in cam 280.

The construction and arrangement of the above mentioned parts beingsubstantially as shown and fully described in detail in the patent abovereferred to, further description thereof is unnecessary and referencemay be had to the aforesaid patent for any matters of construction notherein fully explained.

It will be remembered that the rock shaft 80 is mounted in bearings soas to have a fixed relation to the tipping updraw lever 18 althoughpermitted to rock about its own axis. By reason of this fact, the saidrock shaft 80 upon every tipping or tilting of lever 18 about the rockshaft 19, will receive itself a corresponding tipping movement. Thistipping movement of rock shaft 80 is in a direction transverse to theaxis of the said rock shaft, and also transverse to the axis of camshaft D. The cam shaft D and cam 40, however do not share in thesetipping movements of lever 18 and rock shaft 80. Accordingly at everytipping of rock shaft 80 .and of its dependent arm 88 the roll 44carried therein will be tilted relatively to the plane of the bearingedge of cam 40 about an axis transverse to the axis of the cam shaft Dand cam 40. Therefore if, as in the construction of the before mentionedpatent the said roll 44 is the cam roll and is in engagement with cam40, at every such tipping or tilting of the said roll, it will beprevented from riding evenly on cam 40 with the result that not onlywill the roll 44 wear rapidly and unevenly, but the cam 40 will berutted and pitted by the above described variations in the angularposition of roll 44 relatively to the said cam 40. To obviate thesedifliculties, and to eliminate such wear upon cam 40, I provide anintermediate arm 50 (Figs. 1 and 8) carrying a cam roll 52 adapted toengage the bearing surface of the edge cam 40. This arm 50 is disposedbetween cam 40 and arm 88 of rock shaft 80, and is arranged to swingfreely about a fixed pivot or stud 54. The stud 54 (Fig. 4) has ashoulder 56 formed thereon, the portion of the said stud adjacent to thefixed arm 88 being enlarged over the other and relatively thinner portion of the said stud. This thinner portion of stud 54 is securedrigidly in a bearing 58 in the machine frame or head B by means of a nut60, the nut 60 being adapted to draw the shoulder 56 of the stud 54 hardagainst one end ofthe bearing One face of the swinging member 50 (Fig.8) has set into it a block of hardened steel 62 adapted and arranged forengagement with the roll 44 mounted in the fixed arm 88 of the rockshaft 80. The construction is such therefore, that whenever the rockshaft 30 and arm 88 are tilted or tipped by the tipping of lever 18 asabove described. the axis of roll 44 in the fixed arm 88 will be tippedrelatively to the bearing 62 on the swinging member 50, but the saidintermediate or swinging member 50 will be undisturbed thereby, and theaxis of the cam roll 52 carried in the member 50 will remainconstantlyparallel to the cam shaft D whereby the said cam roll 52 ispermitted to maintain constantly a true and uniform contact with cam 40.Thus the wear for merly coming on cam 40 as aforesaid is now taken bythe bearing block 62 in the swinging member 50, and the life of the cam40 is thereby greatly prolonged.

In operation, as indicated above, Whenever during the engagement of camroll 52 with cam 40, lever 18 is tipped to operate the pincer mechanismupwardly or down-. wardly, the angular variations of the axis of theroll 44 on the fixed rock shaft arm 38 are taken care of by the bearingblock 62 on which the said roll rides while the cam roll 52 in itscontact with cam 40 is unaffected thereby. i

The pincer jaw 16, which is pivoted about midway of its whole lengthupon the swinging bar 70, is connected at its upper end by a link 72 toits operating rod 15 in order that the tip of the jaw may have anappropriate outreaching movement to gather in the stock which is to begripped. The heel 71 of aw 16 slides over a cam 74 which is formed tocooperate with these connections for giving the desired path of movementand in accordance with a construction of this machine a spring isarranged to cooperate with the link 7 2 and the foot of the rod 15 forcontrolling the flexure of the joint bet-ween said link and rod for thepurpose of maintaining the heel 71 against the cam 74. This spring whichis indicated at -75 in Fig. 5 has an inverted staple shape and its crossbar is seated in a transverse groove in the face of the link 72 whileits legs extend upwardly through a shelf of said link and engage thefoot of the rod 15. This constitutes a veryeffective arrangement forcontrolling the fiexure of the joint between the link and the rod andholding the lower end of link 72, and thereby the heel of jaw 16yieldingly toward the cam 74 (Figs. 5 and 7). In Fig. 6 a variation inthe form of the spring is shown in which while the cross bar restsagainst the face of the link 72 the legs extend through bosses on thefoot of rod 15 and the end of one leg is outturned as at 76 to retainthe spring in place. For convenience in assembling a close fitting eyeis made for the straight leg upwardly through its boss and for receivingthe other leg the boss is slotted inwardly and then laterally to form aseat in which the resilience of the spring holds, the leg having theoutturned end.

Having now described my invention thus fully, what I claim as new anddesire to secure by Letters Patent of the United States 1. In a lastingmachine, a pincer actuating mechanism comprising a rock shaft having atipping movement transversely of its axis, an operating cam for saidrock shaft which does not partake of said tipping movement, and anintermediate member arranged between the cam and the adjacent arm of therock shaft and having a face for engagement with the said arm.

2. In a lasting machine, a pincer actuating mechanism comprising a camshaft, an updraw lever mounted above the cam shaft and tipping about anaxis transverse to the'shaft,

a pincer closing rock shaft mounted in bearings in the tipping updrawlever, a cam on the cam shaft to actuate an arm of the rock shaft, andan intermediate arm swinging about a fixed axis that is parallel withthe cam shaft, said intermediate arm having a face for engagement withthe cam.

3. In a lasting machine, a pincer actuating mechanism comprising a camshaft, a pincer closing rock shaft having an arm fixed there on, a camon the cam shaft for actuating the arm of the rock shaft, and anintermediate member arranged between the cam and the said arm of therock shaft, the said member swinging about a fixed axis parallel withthe cam shaft and having a face over which the cam rolls and anotherface over which the arm can move in a path substantially perpendicularto the direction of movement of the cam.

4. In a lasting machine, a pincer actuating mechanism comprising a camshaft, an updraw lever mounted above the cam shaft and tipping about anaxis transverse to the shaft, a pincer closing rock shaft mounted inbearings in the tipping updraw lever and hav ing an arm dependenttherefrom, a cam on the cam shaft to actuate said arm of the rock shaft,and an intermediate member between the cam and said arm of the rockshaft arranged to swing about a fixed axis parallel with the cam shaftand having opposite faces adapted for engagement with said cam and saidarm of the rock shaft.

5. In a lasting machine, a pincer actuating mechanism including anupdraw lever, pincer closing devices which partake of the movements ofthe lever, a cam which does not partake of such movements, and meansmaintaining a square engagement with the face of the cam and throughwhich the pincer closing devices are actuated in the different positionsassumed by said devices during the lever movements.

6. In a lasting machine, a pincer actuating mechanism including anupdraw lever, pincer closing devices which partake of the movements ofthe lever, a cam which does not partake of such movements, andconnections arranged to maintain a square engagement with the cam andpermit a rocking engagement with said devices during said levermovements.

7. In a lasting machine, a pincer actuating mechanism including anupdraw lever, bearings formed in said lever, a pincer closing rockshaftmounted in said bearings, a pincer closing cam, a fulcrum pin on whichsaid lever turns, a bearing formed in the end of the fulcrum pin, and acam engaged member turning in said latter bearing and on which an arm ofthe pincer closing rockshaft rests and has sliding movement as theupdraw lever is actuated.

S. In a lasting machine a tipping lever, a rockshaft extendinglongitudinally thereof and partaking of the tipping movement of saidlever, a cam for imparting separate rocking movements to said rockshaft,a shaft by which the cam is turned, and a plate interposed between thecam and an arm of the rockshaft and which can move under action of thecam about an axis parallel with the cam shaft, for the purposedescribed.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

FRANK E. DROlVN.

Witnesses CHESTER E. Romans, LAURA M. Goonnmen.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

